Then you're using the wrong formula. Look for mattifying or mineral facial sunscreens, which absorb oil (we like SkinCeuticals Physical Fusion UV Defense SPF 50 and Sephora Mattifying Moisturizer Sunscreen SPF 20), and skin-cooling body sunscreens to prevent sweat-induced breakouts (try Neutrogena Fresh Cooling Body Mist Sunblock SPF 70). "Noncomedogenic" is also a good word to look for on the label, says Ranella Hirsch, an assistant clinical professor of dermatology at Boston University School of Medicine. And be sure to exfoliate or use a foaming cleanser after wearing water-resistant formulas. "They contain ingredients that dry on the skin like glue, exacerbating acne over time," says Ellen Marmur, an associate clinical professor of dermatology, genetics, and genomic research at Icahn School of Medicine at Mount Sinai in New York City.

If you can't bear an extra step, switch your facial moisturizer to one with SPF 30. We like Olay Complete Daily Defense Moisturizer SPF 30.) People who wear sunscreen daily have 24 percent fewer signs of aging than those who don't, according to a study published in Annals of Internal Medicine.

And for the laziest of the bunch: "The easiest thing you can do as part of your regimen is to wear a hat with a four-inch brim," says Rigel. "One third of all skin cancers occur on the nose. A hat can lower your lifetime risk of skin cancer by about 40 percent."

You don't want to smell like a coconut—we get it. Look forsunscreens that are fragrance-free or designed for sensitive skin (those tend to be scent-free). We like Coola Face Mineral Sunscreen Unscented Matte Tint SPF 30 and Babo Botanicals Clear Zinc Sunscreen SPF 30+ for Extra Sensitive Skin.

Remember when sunscreen was thick and chalky? And you wore peasant tops and watched Lost? "Sunscreens have improved a lot in the last five years," says Hirsch. Some go on more like serums, thanks to new technology from Japan. "They took heavy sunscreen ingredients and turned them into an emulsion that's nearly imperceptible on the skin," says Hirsch. (We like L'Oréal Paris Silky Sheer Face Lotion SPF 50+.) Others act like primers, with peachy tints to make skin glow and a silicone base to fill in pores and wrinkles. (We like La Roche-Posay Anthelios 50 Daily Anti-Aging Primer With Sunscreen.) "But don't rely on powders or foundations with SPF for sun protection," says Leslie Baumann, a dermatologist in Miami. "You'd have to apply 14 times the normal amount to get the SPF listed on the label."

"Sunscreen oils go on totally clear and protect just as well as lotions,"says Marmur. Try Clarins Sun Care Oil Spray SPF 30. "They're a game changer for patients with dark skin." And no, they won't accelerate a tan like baby oil.